Linear Ohmmeter

If  we’re working with analog Ohmmeter,  we get different scale for high and low resistance value, make the reading of higher value more difficult. Just switch your analog meter to voltmeter mode and use this adapter circuit to make resistance reading easier. Here is the schematic diagram of the circuit: This circuit uses LM336 for good stability. The LM336 is […]

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Using Current Source To Make Linear Scale Analog Ohm Meter

Many analog ohm meters have non linear scale, so the resolution become worse at higher resistance value. This because they use cheap current source, only a series resistance to approximate an ideal current source. An ideal current source will force a consistent current amount regardless of the tested resistor value.  Using regulated current source, the current flowing through the tested […]

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